Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

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NHTSA — Power Train Problems

2006 Pontiac Grand Prix (Page 2 of 3)


hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
69,432 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2006 Pontiac Grand Prix drivetrain problems

drivetrain problem

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2006 Pontiac Grand Prix Owner Comments (Page 2 of 3)

« Read the previous 20 complaints

problem #24

Dec 022013

Grand Prix 8-cyl

  • 81,000 miles


The transmission is constantly slipping in and out of overdrive. It is still doing this after a 2nd transmission flush. The first was done before 50K miles. Then second was done recently. This is still an issues. Both times there were no metal shavings found during the change.

- Dunlap , IL, USA

problem #23

Oct 062013

Grand Prix

  • miles
2006 Grand Prix gxp transmission.

- 77375, TX, USA

problem #22

Aug 262013

Grand Prix 6-cyl

  • 127,000 miles
Transmission started slipping over 70mph. Rpms began to fluctuate sporadically. Based on other posts looks like the tranny is going out. Bought it from [xxx] 2yrs ago and was told tranny had been replaced so I felt confident buying the car with 90K B/C Pontiac have historically been great cars. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Lewisville, TX, USA

problem #21

Jun 242013

Grand Prix 6-cyl

  • 110,300 miles


The transmission slips and bangs bad after driving around 65 mph then slowing down and turning on an off ramp trans fluid temp is about 195 degrees at time of incident. This slip happens in low gears sometimes as well after driving around on short trips. Also, replaced gear shift sprague lock something two times already. Also the ac heater fan motor has burned out, now new one works intermittently.

- Burr Ridge, IL, USA

problem #20

Mar 012012

Grand Prix 8-cyl

  • 79,000 miles
Transmission failure. Torque converter clutch failure causing the transmission to fail.

- Monroe, WI, USA

problem #19

Jul 122012

Grand Prix 8-cyl

  • 36,000 miles
Looked at transmission temperature gauge to see the trans temp was 208 degrees. The car was recalled for a trans line replacement which was done. This did not fix the problem. Now when car is cold I feel slippage when giving the car gas going up an incline. If you go to you will be able to see this is a common problem. Many people are having this problem. The trans line that was replaced has a few fins build into the line. This does not help the transmission stay any cooler. 208 degrees is way to hot for a transmission to be run and hold up. It burns up this torque converter up then takes the transmission out. Please help as this is costly to have a torque converter and transmission rebuilt. I was told a trans cooler would fix the problem. Thank you

- Millersville, MD, USA

problem #18

May 282013

Grand Prix 8-cyl

  • 54,000 miles


I have a 2006 Pontiac grandprix gxp that I purchased new and as of 5-28-13 I have driven only 54000 miles when on 5-28-13 after coming to a complete stop at a traffic light I turned right and the car only began to crawl into oncoming traffic. Thankfully I didn't cause an accident as the left lane was open to swerve around me, but needless to say the cars where beeping and swerving to avoid me as I could only go 5mph. Later that day I drove the car slowly to the dealership just for them to tell me the transmission has failed. I would think it should last alot if not double the 54000 miles I currently have on the vehicle and it would cost me 3500 to replace!! after being frustrated and thinking what if the left lane was not open, where would I be then, doing some research there are tons if not all of the gxp version of the Pontiac grandprix with the same exact issue, how come there's not an recall, this can definitely cause an accident as you cannot accelerate with no pre warning signs, as I experienced a near miss.

- Matteson, IL, USA

problem #17

Feb 162012

Grand Prix

  • 70,000 miles
The contact owned a 2006 Pontiac Grand Prix. The contact stated that whenever he drove the vehicle, the transmission slipped. The vehicle was taken to the dealer for inspection and they stated that the torque converter needed to be replaced. The vehicle was repaired but the failure recurred. The manufacturer was notified but provided no assistance. The failure mileage was 70,000.

- Bethlaham, PA, USA

problem #16

Aug 012012

Grand Prix 6-cyl

  • miles
As I'm driving on the highway and I reach a speed of 70 mph or higher, the RPM's start to jump around and can feel the car kicking in and out of over drive. At first it started doing it going up a hill or incline on the highway but as time has gone on the problem has gotten worse and now does it even on straight, flat roads. I got on edmonds website and posted the problem on there asking if anybody knows what's wrong with it and how to fix it. I got people replying back to me saying that it is my transmission and they have had the same problem and GMC will not help them pay for or repair it. There are probably a 100 people that I know of alone that are having the same problem. I think this should be looked into, it could become a safety issue and not only that, GMC should be held responsible for making and selling defective equipment to the public and refusing to fix the problem. Something needs to be done, but no matter what happens I will never buy another GMC vehicle!!!!!

- Pekin, IL, USA

problem #15

Sep 062011

Grand Prix 8-cyl

  • 86,859 miles
I bought this automobile brand new ($32,000) from haley Pontiac in June of 2006. While driving with my grandchildren in the car the transmission failed completely in traffic. The car only has 86,859 mile on it. I contacted both GM and GMC and they deny any wrong doing or even partial reimbursement. After doing research on the internet I have found over 2000 people who had the same issue. GMC knew when they made this vehicle that the transmission was not compatible with the cars V8 5.3 litre engine but sold it anyway. Also since they knew the issues that would arise this make and model came without the 100K powertrain warranty (which they had before and resumed in 2007). I'm really curious with all the complaints why hasn't this car been recalled and repaired prior to consumers having to pay over $3000 for new transmissions (to GMC service departments). What will it take for someone to hold them accountable and treat consumers fairly" does it actually take a death from the faulty mechanical issue? or perhaps a class action lawsuit" I'm not certain but I truly believe that my complaint as well as all the others out there (I'm certain some have already been sent to you) should be grounds enough for an investigation as well as a recall. I plan on pursing this matter by writing to both the state attorney offices as well as the president of GM. Thank you for taking the time to read my complaint.

- Richmond, VA, USA

problem #14

Dec 132012

Grand Prix 8-cyl

  • 111,542 miles


4T65E-hd automatic transmission failure. Car does not engage any gear to include reverse. According to General Motors, this transmission is rated to handle 280 pound feet of torque. However, it was mounted in a vehicle (2006 Grand Prix gxp) which by General Motors' own admission makes 323 pound feet of torque. Therefore, by General Motors' own admission, the transmission they selected for this vehicle was never designed to handle the motor to which of was mated. Max torque for this vehicle occurs at just 3800 RPM. It would seem then that an individual would not need to be engaging in hard or abusive driving to exceed the design specification of this transmission.

- Fort Wayne , IN, USA

problem #13

Mar 152012

Grand Prix

  • miles
We have a 2006 Pontiac Grand Prix gxp and the transmission started slipping and shuddering. My wife was driving the car to a shop and it just quit and would not go forward or reverse. We had to have the transmission replaced. $3,000 gone. I contacted Pontiac customer care and they did not help us in any way. I have read story upon story about transmission failures on this particular vehicle. People have been left stranded and without a vehicle while repairs were done to correct GM's problem that they will not fix! is there anything anyone can do to at least help reimburse those who have been burnt by GM's lemons? any help would be greatly appreciated.

- Mckenzie, TN, USA

problem #12

Sep 152010

Grand Prix

  • 55,000 miles
Got my gxp in 2-12-10 with 41000 miles on it. Transmission went out in 56000 miles. Cost 2500 to fix now with 89000 miles the transmission is slipping again. I loved GM cars and if they don't recall this soon. I will be going to Dodge hemi power.

- Atlanta, GA, USA

problem #11

May 152012

Grand Prix

  • 67,000 miles
Currently on my third transmission. Second transmission was rebuilt, then replaced. Car currently has 91K on it.

- Pinckney, MI, USA

problem #10

Sep 172012

Grand Prix 8-cyl

  • 110,000 miles
2006 Pontiac Grand Prix gxp. Total transmission failure at 110K. This is a family vehicle which was purchased new. All service maintained, never even close to being abused and this transmission should be well within its life. As I have read, these transmissions are basically(supposedly) a beefed up version of the transmission used in the 3.8L models. It is same as used in the Impala ss, where many many failures have occurred. Completely failed at 110K. Took into dealership on a Monday, they ran diagnostics, test drive it twice could not find any issue. Vehicle towed in 24 hours later, with a complete trans. Failure. It started all of a sudden, would not shift properly, hard shifts, then would skip gears, then would not go into reverse, then would not engage at all. This is a very serious issue that deserves a recall. Only real option is to replace with a factory rebuilt transmission. Obviously GM will not do a voluntary recall, they are making too much on the sale of rebuilt transmissions.

- Elkhorn, NE, USA

problem #9

Sep 212012

Grand Prix 8-cyl

  • 90,325 miles
Transmission failed on March of 2012 bad torque converter the whole transmission had to be rebuilt and just failed again on Sept 22/2012 last repair in March cost was $2800 this transmission has less then 6000 miles since being rebuilt and failed again Pontiac 2006 Grand Prix gxp 5.3 engine.

- North Adams , MA, USA

problem #8

Jul 242012

Grand Prix

  • 85,000 miles
The contact owns a 2006 Pontiac Grand Prix gxp. The contact stated that while driving 55 mph, the vehicle decreased speed and lost power. The vehicle was inoperable and no warning lights were illuminated. The vehicle was taken to a private mechanic who diagnosed that the failure was with the transmission, which was not suitable for the engine size. The dealer was notified who stated that in order to diagnose a test on the vehicle, the vehicle had to be towed to an authorized dealer. The manufacturer was notified of the failure who filed a case on the contact's behalf (case number: 71-1090706145). The VIN was not available. The failure and current mileage was 85,000.

- Sacramento, CA, USA

problem #7

Jun 032011

Grand Prix

  • 90,000 miles
The transmission failed. Was told this was a problem that occurs in GM cars. Should be recall on cars in transmission that failed. Cost $1200 to repair.

- Trenton, FL, USA

problem #6

Aug 242011

Grand Prix 6-cyl

  • 126,855 miles
When taking off from a stop, the transmission harshly jerks into first gear. Sometimes when coming from a stop, it feels the same as a manual transmission - holding the clutch down. I have had a few close calls as the car sometimes fails to give out full power from a stop. I am afraid that I will get into an accident because of this. GM cannot find any problem.

- Sacramento, CA, USA

problem #5

Mar 192012

Grand Prix 8-cyl

  • 78,000 miles
The transmission failed and needs to be replaced.

- Wellesley, MA, USA

Read the next 4 complaints »

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